Dark Mustard Khaki vs Shield Brown

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Shield Brown is a little darker, warmer than Dark Mustard Khaki.

Can I use Shield Brown instead of Dark Mustard Khaki?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Shield Brown is a little darker, warmer than Dark Mustard Khaki.

Can I use Dark Mustard Khaki instead of Shield Brown?

The same difference applies the other way round: Dark Mustard Khaki is a little lighter, cooler.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.